Remove #include "oat_file.h" from class_linker.h .

Refactor the OatClass and OatMethod related functions from
ClassLinker to OatFile and ArtMethod, respectively. Refactor
the remaining ClassLinker dependencies on OatFile to break
the #include dependency and reduce incremental build times.

Test: m test-art-host
Change-Id: Iebc5b9f81b48fbcf79821cc827a5d7c4a0261bf6
diff --git a/test/common/stack_inspect.cc b/test/common/stack_inspect.cc
index d2aacf0..4df2d47 100644
--- a/test/common/stack_inspect.cc
+++ b/test/common/stack_inspect.cc
@@ -20,6 +20,7 @@
 #include "dex_file-inl.h"
 #include "mirror/class-inl.h"
 #include "nth_caller_visitor.h"
+#include "oat_file.h"
 #include "runtime.h"
 #include "scoped_thread_state_change-inl.h"
 #include "stack.h"